I am a prime number.
The double of myself is equal to the square of me.

which number am I?

When you stop to look, you can always see me. But if you try to touch me, you can never feel me. Although you walk towards me, I remain the same distance from you. What am I?

You order chicken wings at KFC in the boxes of 6, 9 and 20. What is the largest number of wings that you cannot obtain by buying in any combination of the boxes?

Find the mistake in the below maths equations

A = 2
A(A-1) = 2(A-1)
A2-A = 2A-2
A2-2A = A-2
A(A-2) = A-2
A = 1

What has hands, but can’t clap?

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

Can you make a six-letter word using the letters N, A and B ?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?

What has one letter and starts with an E?